Recuperative spelter-furnace.



I ATENTED SEPT. 8, 1908.

N. L. HEINZ; REOUPERATIVE SPELTER FURNACE.

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in Iran/m APPLICATION FILED JULY 29, 1907.

WU w No. 898,409. PATENTED SEPT. 8,1908.

- v N. L. HEINZ. REGUPERATIVE SPELTER FURNACE.

APPLIOATION FILED JULY 29 1907 3 SHEETS-SHEET 3.

throu h a lon 'provi e an air eater immediately under the T D STATES PATENT onnicn.

4 monoLAs L. HEINZ, or LA sAnLhitLmols.

having a' retort chamber arranged over a recuperative furnace for heating the ingoing air by means of the waste heat.

Among the objects of my improvements are, first, to provide means for equalizing the pressure and improving the continuity of movement of the fire gases lengthwise in and retort chamber; second, to

retort chamber and connect it with the, front thereof by valved fiues for furnishing and regulating the su ply of hot air in the retort chamber; and, t 'rd, to aiiord facilities for the proper conducting of the products of combustion about a flue or chamber of the air heater for heating the air passing therein toward the retort chamber.

A further object is to provide the air heater view partly in front elevation and partly in longitudinal section takenon the line 2 2 of Fig. .11 Fig. 3 is a fragmentar horizontal section taken on the line3 3 of ig. 1, showing a plan view. I

Similar signs marked on the drawings refer to similar parts throughout the several views.

v The retort chamber and reouperative chamber or air heater are divided lengthwise and centrally by a vertical wall4, and sepa rated horizontally by heavy arches 5 with a covering of cinder and top-plates 5. At the place of the horizontal separation the vertical wall 4 is provided with a large horizontal flue 4- whose upper part rises somewhat above the bottom of the retort chamber and below the lowermost tier of retorts 6, on both sides of the wall 4. At one end of-the retort Specification 0! Letters Patent. AppIication filed m 29, 1907. Serial No. 386,068.

REGUPERATIVE SPELTER-FURNAGE.

latented Sept. 8, 1908.

chamber and close to the bottom, it is r'b 4 vided with a large opening 7 on each 'si e of the wall 4. The flue'S leading from a gas producer (not shown) communicates with the retort chamber through the openings 7 and flue 4 by' its ports 4". The gas entering throu h theopemng 7 tends to rise in the re tort c amber and thevpressure causes it to travel horizontally through to the further end of the chamber, which is provided with an opening 7 a on each side of the vertical wall 4 for the letting out of the products of combustion. As is ordinarily the case, the gas introduced through an opening or openings at the end ofthe retort chamber and caused to pass through to the other end meetswith more or less resistance from the retorts arranged across its path. The flue 4 is closed at the further end so that all of the gas entering into it must pass to the retort chamber through the orts 4 encyof the gas to rise in the retort chamber vand the obstruction to its horizontal movement by the retorts, increase the pressure at the entrance and at other places in the retort chamber. This causes the gas to flow more readily'in the flue 4 and to pass therein more freely than in the retort chamber to the places whichoiier the least resistance or pressure. The pressure of gas in'the retort chamber is thus equalized throughout said chamber space and made to move more regularly through the space between the retorts, and by this means the first of the objects above mentioned is attained.

The part of the wall 4 which is below the arches 5 is provided with a series of thin arches 5 spannin the space between it and the outer side wa ls 9 and extending along the entire length of the retort chamber, .as

seen in Fig. 2. The space between these arches gradually increases from the bottom upward. At opposite ends of said lower part of wall 4 are provided openings 10 through said wall. vertical flues a in said wall, 'so that the space inclosed between the outer walls 9 and each alternate pair of the arches 5 is connected through openings 10 and flues a and forms a meandering flue or chamber which graduall increases in transverse area'from a point near the bottom of the walls 9 to the arches 5. Through the walls 9 an opening 10 is provided near the bottomand corresponding in These are connected by through the wall 4.

The openings 10? are for the admission of air to such meandering flue or chamber which constitutes what I have above denominated an air chamber or heater immediately under the retort chamber. a

A series of tile flues 11 are placed in the side walls 11 of the .retort chamber at suitable intervals, being arrangedopposite to the ports 4* of the flue 4 and connected with out all parts of the retort chamber. The air heater with its valved fiues, having ports of uniform size, thus placed in the front of the I is attained.

furnace and at points in dine with the gas ports of the flue 4* constitutes the means whereby the second object mentioned above The outlet openin s 7* lines 7 b in the end walls 9* 9 of the air heating chamber, which communicate with the alternat'e spaces between the arches 5 and form a continuous meandering passage way for the products of combustion around on the outside of the passage way'marked air on the drawings. The movements of the air and the products of combustion in their respective courses through the air heater are/in opposite directions as-indic'ated by arrows, the air entering at the bottom and passing on upward into the most enlarged parts of the air chamber immediately under the arches 5. This air chamber is connected by the passages 10 immediately below said arches at the op posite ends of the furnace, as seen in Fig. 2. The air entering at the bottom is permitted to expand and caused to move onward slower as it becomes hotter and until it reaches said largest part of the air chamber; and the products of combustion passing from the retort chamber enter the flue space immediately .under the topmost of the thin arches 5",

which forms the bottom of said largest part of the air chamber and thence passes on downward about the air passage toward and. to the large flues 12 at the bottom which leads to a chimney (not shown). This construction constitutes the means whereby the third object is attained. It is distinguished from the prior art, so far as known to me, by

the independent fines for the products of combustion in the air heater being connected at their upper part with the retort chamber at the exit end and near the bottom through the opening7 and being gradually diminished in cross-section area from the top part to the points where they connect with the. large empty into downdoors l3 for closing them. Through these openin s arake or scra or may be introduced flor reaching all horizontal arts of the interior of the air chamber and ues for the products of combustion, for the purpose of cleaning them of accumulated dust or soot.

All matters disclosed by the specification and drawings herein which are regarded as novel and patentable and which. are not claimed herein are made the subject of claims in a divisional application filed March 16, 1908, Serial No. 421,524.

What I claim is l. The retort chamber having a longitudinal division wall, a gas inlet opening and an outlet opening at 0 posite ends, near the chamber bottom an at each side of the division wall, a large horizontal flue in the division wall near the chamber bottom and provided with ports at intervals along its and a gas supply flue having common connection with the gas inlet openings and large horizontal flue. v

2. The retort chamber having a longitudinal divisionvwall, a gas inlet opening andan outlet opening at opposite ends, near the chamber bottom and at each side of the divi sion wall, a large horizontal flue in the divisionwall near the chamber bottom and provided with ports at intervals along its length and communicating with the space at the bottom of said chamber on both sides, and a gas supply flue having common connection with t e gas inlet openings and large horizontal flue, in combination with an air heating chamber placed under the same and having flue connections therewith.

3. The retort chamber having a longitudinal division wall, a gas inlet-opening and an outlet opening at opposite ends near the bottom at each side, a large horizontal flue near the bottom and provided with ports at intervals opening on each side of the division wall into the bottom of the chamber space, and air Hues in the front walls of the retort chamher and provided with uniform ports emptying into the retort chamber.

. 4. The retort chamber having a longitudinal division wall, a gas inlet opening and an outlet opening at opposite ends near the bottom at each side, a large horizontal flue near the bottom and provided with ports at intervals opening on each side of the division wall into the bottom of the chamber space, and air flues in the front walls of the retort chamber and provided with uniform ports emptying into the retort chamber in combination with an air heater placed beneath the same 1 and having flue connections therewith.

5. In a spelter retort furnace the combination with a long horizontal retort chamber provided with a gas inletopening at one end and an outlet opening at the other or further end and having transversely. arranged retorts, a large horizontal flue extended along 'near the bottom ofthe chamber and provided with ports at intervals along its length communicating with the chamber space be-f low the retorts, end a gas supply flue having common connection with the gas inlet opening of the chamber and with said large horizontal flue.

6. In combination an air heating chamber and a superimposed retort chamberhaving a vertical, longitudinal division wall, the air heating chamber having alternate passages passages for the products of combustion in the air heater, and air induction flues provided with ports in the front walls of the, retort chamber and connected with the air passa es of the air heating chamber immediately below the retort chamber.

7. In combination, an air heatingtchamber and a superimposed retort chamber having a vertical longitudinal division 'W&ll, the air heating chamber having alternate passages for the escaping products of combustion and for the admission of air and cleaning" openings through the side walls and the retort chamber having gas inlet openings and outlet Openings at opposite ends at each side of the division wall and a horizontal flue with ports at intervals, a gas supply flue connected with the inlet openings and with the horizontal flue, exit flues connected with the outlet openings and with the passages for the prodnets of combustion in the air heater and air induction flues connected with the air passages of the air heating chamber immediately below the retort chamber and with the retort chamber by ports extended through its front walls.

NICHOLAS L. HEINZ.

Witnesses:

Ron'r. (1. WEI/ran, O. M mRIsoN. 

